Process of making a composition sheet or slab



July 21, 1931. A. HOBIRDSALL PROCESS OF MAKING A COMPOSITION SHEET OR SLAB Filed July 8, 1927 Patented July 21, 1931 UNITED STATES PATENT OFFICE ALBERT H. BIRDSALL, OF BROOKLYN, NEW YORK, ASSIGNOR OF ONE THIRD TO GEORGE W. MILLS, J'R., OF BROOKLYN, NEW YORK PROCESS OF MAKING A COMPOSITION SHEET OR SLAB Application filed. July 8,

This invention relates to a new article of manufacture, and more particularly to an article of manufacture composed of asheet or slab constructed for the purpose of imitat- 6 ing in appearance and use tiling ordinarily used in building purposes.

An object of the invention is to provide a new and useful article for imitating a series of joined tiling and a new process for pro- 10 ducing the same.

According to the present invention, the body of the slab or sheet may be composed ofany ingredients desired which for purposes of illustration may be asbestos and .15 cement in suitable proportions, the cement serving as a binder for the mixture. After the slab has been produced'in any desired manner, it is permitted to thoroughly dry and harden, after which finishing or pre- 2 serving surface may be applied thereto in any suitable manner and a plurality of intersecting recesses scored in the surface of the sheet. Subsequent to such scoring, a final coat of preserving and finishing matter may be added to provide a finished surface and also to lend to the sheet the appearance of tiling joined by cement.

Further objects and features of the invention will become apparent by reference to the following detailed description read in the light of the accompanying drawings illustrating the same, wherein Figure 1 is a perspective view of one of the slabs or sheets embodying the present invention; and Fig. 2 is a cross section thereof taken on the lines 22 of Fig. 1.

Referring now to the drawings, 10 indicates the slab or sheet composed of an ad- 4 mixture of asbestos and cement in any desired proportions wherein the cement serves as a binder for the asbestos fiber. The slab may be produced in any desired manner,

after which it is permitted to thoroughly harden and dry. After the slab has become completely indurated, suitable coats of finishing and preserving material may be added thereto. The preserving and finishing material may be of any type and character de- 60 sired, but preferably it is composed of lac- 1927. Serial No. 204,211.

, clear lacquer.

To obtain the best finish, all but the last or final coats of finishing material are applied to the surface of the slab or sheet and such material is permitted thoroughly to dry. The slab is then scored in crisscross fashion as illustrated at 11. Such scoring, as shown, produces an effect which very close- 1y resembles the effect given by the Joining of tiles. After the scoring has beenfinished, the final coat of clear lacquer is added to the surface of the sheet. Due to the fact that the surface of the sheet between the respective recesses is coated to a greater depth than the recesses themselves, such recesses having only the final coat of lacquer thereon will very closely resemble in appearance the cement ordinarily used in joining blocks of tiling. As shown in Fig. 2, the tiling has the appearance, viewed cross-sectionally, of the sheet of material having recesses scored therein, that portion of the material between the respective recesses being provided with a thick coat of finishing material, while the recesses themselves are covered only with a very thin coat. of lacquer.

It will be evident to those skilled in the art that designs of any desired character may be scored in the face of the slab.

I claim? The improved process of producing artificial slabs which consists in first mixing asbestos and a binder, then moulding therefrom an indurated slab, providingthe face of the slab with a protective coating, scoring the face of the slab so provided with the rotective coating, and providing the scored ace with a final coat of protective material.

In testimony whereof, I have signed my name to this specification.

ALBERT H. BIRDSALL. 

